For review: Time & date, Essential concepts

A draft of a new article, Time & date, Essential concepts is out for wide review. We are looking for comments by 22 June.

This article introduces a number of basic concepts needed to understand other articles that deal with time zones and handling of dates and times on the Web.

Please send any comments as github issues by clicking on the link “Leave a comment” at the bottom of the article. (This will add some useful information to your comment.)

Note that some links don’t work because this is in a test location. No need to report those.